Black and odorous water body treatment method and device

The invention discloses a black and odorous water body treatment method and device. The black and odorous water body treatment method specifically comprises the following steps: step 1, dredging a river bottom; 2, filtering water and feeding; step 3, sewage deposition; step 4, moving and pumping mud; step 5, sludge guiding; the invention relates to the technical field of black and odorous water treatment. According to the black and odorous water body treatment method and device, in the process that a sludge pump pumps underwater sludge, a positioning plate moves back and forth to drive an assembly plate to enable a sludge pumping pipe to move back and forth and slide back and forth in the underwater sludge, so that the pumping efficiency of the sludge pump is effectively improved, and after the sludge is pumped, the sludge is conveyed into a sludge storage cavity; sewage is conveyed into the water purification cavity, the sewage is directly discharged back to water after being deposited and filtered, the load